{
  "manageEntity": {
    "action": "Save",
    "entityId": "242418984",
    "entityType": "Track",
    "nonce": "0x791be7a0a326e7f026215f058bb17c6d54b2e4585b81fe9c7d53f6a7b4f6f2fe",
    "signature": "0x4882f9a5c5d0c055393a14534f16d1d49d3688ace6059653cc65969a71bfc3282984a7cb542f4b3d544c6589243ec18419997650e0e030a3ed0ce801b524b64d1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}