{
  "manageEntity": {
    "action": "Save",
    "entityId": "1038370094",
    "entityType": "Track",
    "nonce": "0x5193893ad1a150b1ba1a82d641dedad388af571cc23f21ede4d6d0a936995c11",
    "signature": "0x666880d29160a0ccb909fc1aa43e66d2e80115a043babcf7426a7e27f3557785206fa31aad31991f51ef291d366f2c4c282e7736b472fdf7ef9496e3139c0b651c",
    "signer": "0x98B3f06eAEa080E8d8b1C86F1c9FD36Eb33dEd5D",
    "userId": "615702798"
  }
}