{
  "manageEntity": {
    "action": "Save",
    "entityId": "1738299734",
    "entityType": "Track",
    "nonce": "0x6b2443fed0ccf5bcca5396c579f30635b203bc407d7648862b26708ab80a8911",
    "signature": "0x758bc85859123b68c381c395cb9700afe874f0b4c6a62ed5c635942a895cb016089f1e1c308699d23bdea97e99de3bc03f9573c66a57f221a0f0069d69ba0b571b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}