{
  "manageEntity": {
    "action": "Save",
    "entityId": "1631966065",
    "entityType": "Track",
    "nonce": "0xc25938f7cdd494facb730b9c698745bd5b53e33e88c23009ea0aa5cff5775685",
    "signature": "0x9c53418c03e03416715b3af5e2a5e12f9d06f12d744a418a73b5119b265ecd2f26793cea2564dbf1f4279f85a94fc263032ee021d54c140cf4205922a1d4588d1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}