{
  "manageEntity": {
    "action": "Save",
    "entityId": "2044342333",
    "entityType": "Track",
    "nonce": "0xa64068b68660777625a1659ba6571f713d3dfa177cc4d0fd9f05395b6546522a",
    "signature": "0x3603bd789acabf1c43d00a7c54544186a7c288cb621207337fbc7a7d2e319327489e86ea63b21f0963f825850649998b31be68ac19a272c77f002d0483cf007e1b",
    "signer": "0x90CBf7c9BBF688fd9Fa4029B96e1BC32b270cA24",
    "userId": "711459379"
  }
}