{
  "manageEntity": {
    "action": "Save",
    "entityId": "1507285895",
    "entityType": "Track",
    "nonce": "0xa3bf47c11b4088719c1ede3cfcf2b6a9ca6661af2f7b2a075d780e035d0a55db",
    "signature": "0x0e1dabc5e56d101bac38b355ff6413693d617faea066148b885ce994da08602a31877b0f9fa47c3c55b4239907dd03c9881596f0471124067713ce3ab07776921b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}