{
  "manageEntity": {
    "action": "Save",
    "entityId": "1751882932",
    "entityType": "Track",
    "nonce": "0x70b9dddd3805b44b7e97a550534b076f97f0727967b6da8f569d57677f004cc1",
    "signature": "0xd4f1b9f00d90047f20e933230767a11ecdbe55b98f9e1581cd693159095abace2565913ed682b661d2a527e822d8c20bfa35760374884fa4b2351c06db60587f1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}