{
  "manageEntity": {
    "action": "Save",
    "entityId": "1516109602",
    "entityType": "Track",
    "nonce": "0x0fb138b999cb13ddff831a76d011dcb97a8fa00e1e6d8532ebf9de78e641f5b5",
    "signature": "0x439b46af6ea372ab778bb3ecb6777a165dd3cc5cff204dc7403bbd76b29179f63737006bf5bd4eb90ee21142c5ffbe0e1d6409da21cc55825e822c07129cf95d1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}