{
  "manageEntity": {
    "action": "Save",
    "entityId": "8996",
    "entityType": "Track",
    "nonce": "0x3fa17ade3657f950d47dfe33246b077b7aa414dc4f53f5d1fe4ae220f7c4d112",
    "signature": "0xacc3bf13f892975444ac7bdc2431bec01873b1ab4f3dcfb7af7cb59b6c0289bf35ffd8af260bddb3175db6ce81817cf7bdddcb5ee916936bef0c04e43013465e1c",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}