{
  "manageEntity": {
    "action": "Save",
    "entityId": "1673724233",
    "entityType": "Track",
    "nonce": "0x0138e100bb92d560557938d0a6990d9193e6c9ced28129b0581670da5dd18a56",
    "signature": "0x5cd99f75904b31978b585c2478047e92e1bb6c116ece65c873446fa3c3780ba15c422dcb7a4b12e4e8902a4588077e8ce09758b060a08e578c4b88d91bd450171b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}