{
  "manageEntity": {
    "action": "Save",
    "entityId": "1036582541",
    "entityType": "Track",
    "nonce": "0xbf57c420f9ce5432a4a59872f6e45d6639455ae071c315ee59e38934de0b1dc9",
    "signature": "0x3cb678a23e0e1b804d82cddf51678d18b58643f9f4f859daaaea68ad796cc1c14342f38219ba48b52ee341354f5bde263b87bfe6933300d49f3048a04fbd89411c",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}