{
  "manageEntity": {
    "action": "Save",
    "entityId": "1577157925",
    "entityType": "Track",
    "nonce": "0x269841c7f01f0dc867f881baaaeceefe2f805c165f0d85733c095f5fee2e4ad5",
    "signature": "0x4628b57670522068115a960791e44e1815f333253f62fb3a5155ff30780996550c48aaa8a6338341cee89e2dc6d5a22c15eefee37b04f705a0b7edf6e218a8671c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}