{
  "manageEntity": {
    "action": "Save",
    "entityId": "1781356835",
    "entityType": "Track",
    "nonce": "1786087009884482808",
    "signature": "0x3d02e69435af46c7ea93c764e9cc4915f5ec9ae2504e29ef077c7ec6b73b90644a9f6ee7dd05ab91009ff0ad864813616fecadc021b6233d48982dad6183459e1b",
    "signer": "0xd30fAF377491796757Ef4C1B0ccA8a407920e663",
    "userId": "451691735"
  }
}