{
  "manageEntity": {
    "action": "Save",
    "entityId": "342696",
    "entityType": "Track",
    "nonce": "0x148861503869dddb995a75db0dd974bccaf31c302e644b07f39958d06e2bc4f0",
    "signature": "0xe640f391500afa93d10a5fd9bca02cd3143174d141850089e43e04aebbd7aba0147748969675ab60b0b4f2f20af67f357248273dba0b664a88402767ae969adb1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}