{
  "manageEntity": {
    "action": "Save",
    "entityId": "364507491",
    "entityType": "Track",
    "nonce": "0xc53abae133c79850559504a633daf8058d577082c64d440de53d5a68982c8d61",
    "signature": "0x703f3715cecd6e9c3c7eabb4591d29af0c7705e984ea0147e05881d89521f6084ac7973ceffa2d4c407a7012afc2698495036ea999852895eba177d4cb9c16171c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}