{
  "manageEntity": {
    "action": "Save",
    "entityId": "378583034",
    "entityType": "Track",
    "nonce": "0x8d2330f19a15662035b37b589dca0ae5477d06061649553b27b165d6600b86d9",
    "signature": "0xaad00ffeb0f7890f707467319750e680b481618f7c2dfb57b094d8b5dc3e2f9f7e02660e1dda11bbe40fcd1c232f5ae073792c6aa93584e194b46bf2d31cb3801c",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}