{
  "manageEntity": {
    "action": "Save",
    "entityId": "368102561",
    "entityType": "Track",
    "nonce": "0xafab110f47f97e90a4e3f11f79170197a0c3934994f723ab1471b456f7e7341c",
    "signature": "0x0a22aadda1566d339878ae73f86e6fe1cea68e3559856c39c4d2c86e5ce5dcb86d05d84c06ae4f1cf3b54617177ee1b2209f895238c3936c44389a2a6d0aa5931c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}