{
  "manageEntity": {
    "action": "Save",
    "entityId": "167570078",
    "entityType": "Track",
    "nonce": "0xad174513c8e98c2a65019dbf43e430d3b923b458c0dde489d71704755fde5ffb",
    "signature": "0xcba84a0ac51d36d02c84d3a51828be1d488c22c62a1a989fc3ae3f77526160f12e8ef966b33e2f771de46fc192828571eb67dd140ddcdb9c179b18b494e70c1c1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}