{
  "manageEntity": {
    "action": "Save",
    "entityId": "1608559167",
    "entityType": "Track",
    "nonce": "0x8263c695dec9b2b27ce402a5b5a75bbe3a1ed795e2807c75465ca9eb00c096ec",
    "signature": "0x68046a8773c76c240e59782ced02ba489c3773bf1f6ed39c29530dd4b5300ee80b4e6bd67c2b9404456d1992d7d508ac636b16bed3feb21bf87d764fdb162cb81b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}