{
  "manageEntity": {
    "action": "Save",
    "entityId": "937257583",
    "entityType": "Track",
    "nonce": "0xaaaf4e40b876400622a7f96332647d98e8e7b53d19a82d20dfacff4e0f6c0ad8",
    "signature": "0x27375d0839e999de3b0f9b19c4a2d3f40abe07502cc1dd6ffbb8405b9283f18834c05b885ecd13439755d5fd9f4d5808c587cd4faef38ff88e536f43d514d14e1b",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}