{
  "manageEntity": {
    "action": "Save",
    "entityId": "1562564471",
    "entityType": "Track",
    "nonce": "0xf2ab8e76669929e340f8efb5a7f0f0d92f67db6163a18191b42e3699a56bf15b",
    "signature": "0x4909e9513ed9313b856a9d8f5db89734c6617a0b44cf547770a96f2b7e1cc53305ddb6916f473e93bcc2475c647149584760cde0d3a01a029f2fdb1b70bb695b1c",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}