{
  "manageEntity": {
    "action": "Save",
    "entityId": "641985",
    "entityType": "Track",
    "nonce": "0xb2367b6eb4cee245fe796a579a188e791d004ad7f7bce6619a0c22e2171911ab",
    "signature": "0x40f4826030e5cc180b8bd3923d616b3e6e48d729622969dc89bfc5252fe67969123acd858512c25767e114d1086b70f310c6f9d8e4a6d8f0261a8026e0f8f7b51c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}