{
  "manageEntity": {
    "action": "Save",
    "entityId": "1372671211",
    "entityType": "Track",
    "nonce": "0x581f0ae85415434f31f1c0e7b389d54a26946d267dc9e1c30333f595decb7b09",
    "signature": "0x275328dedddfae43060491536e3c0c1cbf3d103317cd31e94dc3f3b7560302701702a841da9eab0eb5b25899df95c32c6cad610cd47beae7ccd998bd444d28451b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}