{
  "manageEntity": {
    "action": "Save",
    "entityId": "446509418",
    "entityType": "Track",
    "nonce": "0xc33f0881df1063ea0f9475776aa50ef7426862cb92c0f4c9501b32dd0238b24d",
    "signature": "0x25623621410e3f4040b1b6444c46ff0fa6281c5effe68d16696904037390020321c5852adb28bb7b3cfb4b4f5431e66e6f1910935b403e3491c738f813bbed3c1b",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}