{
  "manageEntity": {
    "action": "Save",
    "entityId": "251586",
    "entityType": "Track",
    "nonce": "0xae1d7f13744a7ad26696e5b6abd358b741c9b2b066300f58f2489d3602343577",
    "signature": "0x5870fa060f7c6a10a899ad6e61d2748df03e1ef5550c0a473319718f749de00d4c512df1d7f76206212089910a9f98bc141cacb2905db55f22b1a37cba588f381b",
    "signer": "0x368e43DE291CD320cF48ECF204107F88a5dC1533",
    "userId": "75915611"
  }
}