{
  "manageEntity": {
    "action": "Save",
    "entityId": "317338",
    "entityType": "Track",
    "nonce": "0xb6db24d267d7a5af007e1ed57230f2771cb2122b9e2fb6fd8c013c4cd39b9209",
    "signature": "0x9df1524797e177ec61e1cccea4e012c9292ab8ddbaeb7ce818af5fab90f4505b2062285fd010dc7ccb7a26c2c6734420f72f961a1bb3ead943b2ff057d29adfc1c",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}