{
  "manageEntity": {
    "action": "Save",
    "entityId": "1205591502",
    "entityType": "Track",
    "nonce": "0xd780aebb4d574cb14318a9495678d7aabfd8ecd3c44d4f571ce9f5b76ab57798",
    "signature": "0xaf9f6955372273cd3338d0d9fd16f2bdbe61223f999870aacbd14fec87b280c84b27e544fd7ac6a8d632bf7c4459149cd95e843f353e5befafe3b440ba614df91b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}