{
  "manageEntity": {
    "action": "Save",
    "entityId": "225822821",
    "entityType": "Track",
    "nonce": "0xa615923057ad72636475180f4668abd5781327651963bfd7054ec22c2d66426d",
    "signature": "0xebccbc6777181ee437a95fed57745bcca957d31206b3ba8e3558b1dfd301c172604213681f0360dc3114693ab8813b3446ad1fb0554fbd89202f6934e61bdc781b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}