{
  "manageEntity": {
    "action": "Save",
    "entityId": "436762849",
    "entityType": "Track",
    "nonce": "0xac5c474aadb36c9d6113076dff4b969ccc7ef40de9eb7c016e9f1543a0a7be4c",
    "signature": "0x5ec44b5cbe4622a214b3fae75bc042bf178dd27a727c8cd0e2413c2c795f502c1af5ffb70fb286eb7a22c437e02da342cfb8cb13bfe7460cfb76713dea14d5121b",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}