{
  "manageEntity": {
    "action": "Save",
    "entityId": "329711778",
    "entityType": "Track",
    "nonce": "1792132808335566027",
    "signature": "0xbba5defcd42c26cc86ff4aecdc047f06e2a034ba70e94e5bab89c4eba07e45b264dfe9e51a86cc67c38b430cfea582f23a0b35af5e79097831c9fd60ffe94d601b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}