{
  "manageEntity": {
    "action": "Save",
    "entityId": "1770218255",
    "entityType": "Track",
    "nonce": "0x0055ffbc88188187d76880e9be0822bd20ef40be4faad0f5fddb6c35d0f63405",
    "signature": "0xf037704545b62e09d58676b9eb1c38ad1a89093b89f7becbf5479bcd2d3aa18e5373c7e1acc1c8645552de563cc8a48a7cb8274d655ed67d3c56a07a299fb3cd1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}