{
  "manageEntity": {
    "action": "Save",
    "entityId": "11997",
    "entityType": "Track",
    "nonce": "0x38e9e7d5ab01368502a6c76b0cc2d26f13e7fa0835ff79d04f4802c891127d2d",
    "signature": "0xf39ca9226f615737b7bfbb7a01d019c836ffab15c33740c6e848c16dcd79bbe971cb60e0679711b5215014785668b9786fd1911c9805a20cbde485bee70cfd971c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}