{
  "manageEntity": {
    "action": "Save",
    "entityId": "465852",
    "entityType": "Track",
    "nonce": "0x536114de9b0baef61b0fc7a678e35c763986f5aa1f4011814dd325dbdb0e8a30",
    "signature": "0x00e816578132a39d243d4fec03eee8b44e189ac12a8c4c1d386f40c2d3a6eb1f717dd86df39c08307ed1a5caae523514d53a0aa7c8302a2c34c70576405591071c",
    "signer": "0xf39D3e3Ea8b52437CD50Aa1EE0BD56d4431FC6CD",
    "userId": "183245"
  }
}