{
  "manageEntity": {
    "action": "Save",
    "entityId": "1216271250",
    "entityType": "Track",
    "nonce": "0x06a92c5372667525213c9b37cc501e1c51abbd290b8779672640f602210915a1",
    "signature": "0x182b1831ab3784947321d60e46d4f6ccf28ff8a0020c334cf17853d542f91ca765ae526cc53cb1067ca8542ec923f3f99c5bf05bfac4019b574519f800cf4c681b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}