{
  "manageEntity": {
    "action": "Save",
    "entityId": "2070817665",
    "entityType": "Track",
    "nonce": "0x0f9a3e49f10cd9895300d8844137ab8c9749d8087ee593e68e6253d99f7bc973",
    "signature": "0x91bda1ef801d0d056df62309860919fced27f789f1b4b585046f6ffa44bc4f591e95ed98caad1b899be2b858664d7b07e44638b980c41aedca0c35d154564f741c",
    "signer": "0x5D012C880480A2E1ab4345f6F374CFf73e040331",
    "userId": "10449019"
  }
}