{
  "manageEntity": {
    "action": "Save",
    "entityId": "1949641169",
    "entityType": "Track",
    "nonce": "0xc5147569916059750faa96d48e25612556604c950c670de62c593bb25dc66080",
    "signature": "0x4372677295bf54fbd36158a88c9112629e02a2d3faaaaf9d0dd0820684c452172529eb58dc82475dfe6239974a041233e6fccab6dbb553d2825398c899f2074b1b",
    "signer": "0xa8E11aa224d2579f5cbdb912866bCE84Eb10f9dD",
    "userId": "951616224"
  }
}