{
  "manageEntity": {
    "action": "Save",
    "entityId": "247882355",
    "entityType": "Track",
    "nonce": "0x8bf2b20aedaa08b8951b81ebe24287c560be28de0f842b0a52b29d1b86a40a09",
    "signature": "0x093b9480e5683abff79be43e44fdfed485c659532cde133d8c09e552eae304c46780a51d856ac7d00877b100270f9b91e2d3cd9988152ba2eda20f74e2809dfd1b",
    "signer": "0xa4A8a4853051b18e0f0f777693Ce34CF4bCe9385",
    "userId": "634886384"
  }
}