{
  "manageEntity": {
    "action": "Save",
    "entityId": "1776333031",
    "entityType": "Track",
    "nonce": "0xdec12ff4d9f6594a45240b4273086395cb9b857bd48c86e1ce576c7243108fbb",
    "signature": "0x967367d965b4dbc422dc3560a14700faf70316c5dce504f578988d4ce33243277ecbf9c98c41d83d9a2194c3490a99bf76843a129c639354c081d3513621999b1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}