{
  "manageEntity": {
    "action": "Save",
    "entityId": "286716",
    "entityType": "Track",
    "nonce": "0x0f73e2fbb4b4a872b645ba5ed8e208d6f34477314a5e830e9d0aabcba2c2ac0b",
    "signature": "0x3424c502462923336295808622c3d3d95733638c9c7710a5532826040e422d8945547f5af7f34575bd36601d8dd8929d548edf191e88dc9f94513cc50fc8e4ae1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}