{
  "manageEntity": {
    "action": "Save",
    "entityId": "1784827159",
    "entityType": "Track",
    "nonce": "0x9361524ec2aa1af3b5a0ea3437011759d806800d2b86202a17afe30935492bd4",
    "signature": "0xb42bb956f11265ef8a7ab97e779a11b00d8f8691db1d30cf92754f311ca0c2bc6365f8dc734293cb42b74c7faea1c3979b451526955fa4cb38d4b019144a4f961b",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}