{
  "manageEntity": {
    "action": "Save",
    "entityId": "1200430174",
    "entityType": "Track",
    "nonce": "0x9a20cbea84b814ba2b1265a42c11343e2c5ec9777e7b7f56a4884543e1a4e090",
    "signature": "0xd3e737c0c5453a871f784fcba4b40c5af376a0daf4714fe7ae5b3aa39a40f6c02648a7c97dd2c82432399ec1b44683e43532aa9c3f2efb6892365d1a7d4e69a31b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}