{
  "manageEntity": {
    "action": "Save",
    "entityId": "1889192569",
    "entityType": "Track",
    "nonce": "0xc5b19865481fb7f42d51e873c5c81913455b5ad74b034d2d2b3a72c0c2088065",
    "signature": "0x9b660f6fa6b2bc1bbd97eadfe9f528e2a09a8724c295d9686fc9b508ed2b865f7bab27171b4960106f9e12e4f5d88d14c05e086ef4013a0f000e444e127426781b",
    "signer": "0x775bA7FB8a4FF9354c099465ca493BA949FdAca6",
    "userId": "597677270"
  }
}