{
  "manageEntity": {
    "action": "Save",
    "entityId": "806693525",
    "entityType": "Track",
    "nonce": "0xd8a4570872063fe7b8af56329fda41ba38b0507a9e72ee987600d6d5aa2fbb85",
    "signature": "0xc17ec6421dab34a515038c41d8497ff7d5b77c0da31304dd7a0167b620f772c844eac5232b4c2a7af3db1d7b2a665ec489f61d979189f3c384afe0717edbfb161c",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}