{
  "manageEntity": {
    "action": "Save",
    "entityId": "2055838672",
    "entityType": "Track",
    "nonce": "0x1b05b517ba5389317fdce0ea4b36e4041e70a6ae6871ce7026160e909e4b1541",
    "signature": "0xd5928d4362629a25108f74cc36cc4f170d942366116858c873756b3946ddcd0949984dbdbbf82be22f0768468269fe25635c12fe822900b16f13feeadeeae3e11b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}