{
  "manageEntity": {
    "action": "Save",
    "entityId": "1058571",
    "entityType": "Track",
    "nonce": "0x5ecfdfcdb9525c780d7661641d816337bdfb10d5bdc7f58e8d65d983e64accfe",
    "signature": "0xaacd13b55f220602a590f5a5e1e8f165db9fcf9ac3e26ac6eb6d7f26aa2ddbb12568f529988a416a4120bcf60674bba6bc171b7e5ab5b514643ec076928650ac1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}