{
  "manageEntity": {
    "action": "Save",
    "entityId": "1828956713",
    "entityType": "Track",
    "nonce": "0x1d698546416869228d47376914ba87ac45cfe45377f4e6139837e819002d6772",
    "signature": "0xc396e661e35c90a3b4a08b28ead2b0892b3931fcd1e9569a6297ec632b3ee39f58e65ecf75c6b0711edbfa44f74967d1cf54527a39e33ab586f95827496589ca1b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}