{
  "manageEntity": {
    "action": "Save",
    "entityId": "555114",
    "entityType": "Track",
    "nonce": "0x32f9a2acc50fdbf4b93f6c98a3717599b0aedc0a566d9707ebb5b1fc4a2e9d60",
    "signature": "0x0a9ccecbea81dd69d11905f8daef680354931ae8ecbaa0ec86781c3c131a5d584d6a8a53d78549959dd72aa8debf82412a9f49c461223c04016777fcb837a0ed1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}