{
  "manageEntity": {
    "action": "Save",
    "entityId": "386592",
    "entityType": "Track",
    "nonce": "0x653ab3ef8847bb115c3f4c42afe3d3822c3aaf78d9030c66ce87893fa06b62d7",
    "signature": "0x919e6a7dcf33272a84852affaf9376f382ceb3ebb797b91e775d9094ddc7726e7917397808012c8d0f6481d97a1e26ed028f9b917dd3c38a252081a6d18eb1701c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}