{
  "manageEntity": {
    "action": "Save",
    "entityId": "39174373",
    "entityType": "Track",
    "nonce": "0xd7ecb6c70501c1d44798ea819c5591720187be3a054e2a3b6c84a8bc09c43870",
    "signature": "0x894ffb537503c8ffffe05729cb632e4cb00e6c1f33781934f46035d5d29a1d0f0bbbe5bfdf4827da6a0c0f9f8cc9f33972f30c52a0702716c60e36955e7276501c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}