{
  "manageEntity": {
    "action": "Save",
    "entityId": "220059789",
    "entityType": "Track",
    "nonce": "0x1d089c6a8765902bbdb5406a1e8f1e339f2b866e94f6e652c6cf5008cc4508be",
    "signature": "0xb7a334a6ec821f58fc6597b72245902e17507ab2a5a7433c9ab806fe160b661b2d2b4bbce9051593222abed7ad1cabe00eaba149c0b1a2ac3745b894aba0026a1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}