{
  "manageEntity": {
    "action": "Save",
    "entityId": "441222259",
    "entityType": "Track",
    "nonce": "0xbb28367083bb2d60594c95ef75e48e40040cb36a40bec307071830c6bfaca3ae",
    "signature": "0xd286b973d577a2fa4bd593414e8b0825e14c52d2a58e08e7a79fbf23729668161f8d4f1844db4843ce9b7f70522f012bc23a73cb690a37f138450b9d4dfccb971b",
    "signer": "0x92d3aEA782A42D4B044a13a4727af9Aca3a0211F",
    "userId": "12615893"
  }
}