{
  "manageEntity": {
    "action": "Save",
    "entityId": "1803998235",
    "entityType": "Track",
    "nonce": "0xaa9fd452654deaf326460904cebf48d77a6f5776258e1baaf6cdf29ad9ada69b",
    "signature": "0x360ebe733ead0d0f29be580da4995d8fb60bc55cce7a8be77c4c31a88112716b5b00a66a2be71c6a98c1edf66415443a07933e60ecabfb377f2276969328bd971c",
    "signer": "0x34Cea527C1dc0575a5B686515aad0Bf8F3b5f97E",
    "userId": "13589021"
  }
}