{
  "manageEntity": {
    "action": "Save",
    "entityId": "1336548929",
    "entityType": "Track",
    "nonce": "0x5d82103c8913c3d73a41d2dedb4c00026ff11afe93527e5cae4b1b888d3597ae",
    "signature": "0x027fb79b44626a84f671c4ddc289584bd12c7d141ffac4da831b8296c48bf7a56a63c47aeaa418039269ed3b379d104f3666b198e4c8de0564cbb5e53d82d7fe1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}