{
  "manageEntity": {
    "action": "Save",
    "entityId": "854270",
    "entityType": "Track",
    "nonce": "0xc70a5d4f8c2b02cd98c22d38073bb6bbff84b8ed5f653ee202ffc4f816254757",
    "signature": "0x303757ad934029e1443c146036923cb6d51ed037a0856f9400bd5e4bffa58ed346afe6df02b7fc8e5b9f79572ce67a7b7aa6f68714b74791f5bea16d829b451a1b",
    "signer": "0xa8E11aa224d2579f5cbdb912866bCE84Eb10f9dD",
    "userId": "951616224"
  }
}