{
  "manageEntity": {
    "action": "Save",
    "entityId": "822502734",
    "entityType": "Track",
    "nonce": "0x7fd4b58755b548d1565835d602b26299764e773eace7fd69f37b79019c0388e3",
    "signature": "0x4bebae4b20eb59131edfdb6e2fc28ba46880fd9c1328c29247406531c326942570c7ad734ecb870e7206561a7729fb33feda953bc945af6e2cfdcb168a3b17511c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}