{
  "manageEntity": {
    "action": "Save",
    "entityId": "1489991351",
    "entityType": "Track",
    "nonce": "0x8adf9d6aad93932da01fd27c20102eb24af85735a94819c881c6c01f22071593",
    "signature": "0xff7fb37759c887d18161acbc0eee522a2240f5ff33cbc0f07b72d710f8b0fad500895c2ea55b7551743f9e57cb7058d9f08ab0597cf3851e93efa29bf2272acb1b",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}