{
  "manageEntity": {
    "action": "Save",
    "entityId": "1748120788",
    "entityType": "Track",
    "nonce": "0x59abae3d85a699577b468565c31879fcb8d473f2bb261f48ce124809e0d342a4",
    "signature": "0xeb901be564163b342f18b5550a3fd1deff026717b5e231798b817d1001f744af3dcb8dba941bad7fb83cebfee7d2e1a755266c0611480ba2f745ec3bab8f00701b",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}