{
  "manageEntity": {
    "action": "Save",
    "entityId": "938960660",
    "entityType": "Track",
    "nonce": "0x51202688c3efea2a3f212d6537f09d27bd06ac61ef2d5950e5101bfeb8e5b48e",
    "signature": "0x881570f1e1bdd575ff3901f65fc53be1c80ca3bcb3f88b1ff96155b944f503220a969bcd6c9819a5ae1e80d597807f748a5e677e8b137d601f6f97297283587b1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}