{
  "manageEntity": {
    "action": "Save",
    "entityId": "104319211",
    "entityType": "Track",
    "nonce": "0x950a00be4d011bacd83565ccf657f817a5e0d25b843938edbc582e74f55e7036",
    "signature": "0x7eb894ce68b02538b09a57821c877858311cba0ddc301f285af2941ca841348c11490cfba3a7fc5e8bc6c6695d39f9d4ba6f341c8eaae2660a9b3e3e0942ac901c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}