{
  "manageEntity": {
    "action": "Save",
    "entityId": "535584036",
    "entityType": "Track",
    "nonce": "0x45daaf7c8397dfb622b00517a591f9f8bf5cdef241422f5a6a41cac7ceecb2ed",
    "signature": "0x1767f2d058bc9d2ce4ffd1a8bfcbc49d22f25198e12da1d29a37cd687723be3a43288e804b3bc655f28534ef0c0318207255489faf693a1bace717eedebc0cb61b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}