{
  "manageEntity": {
    "action": "Save",
    "entityId": "88397207",
    "entityType": "Track",
    "nonce": "0x50407fe32d22c3906f8bc498ae48444effad0fa17332bf2c91f778507ee90d45",
    "signature": "0x5ec58f236afacecafdad1fb828c22186af55fa2c1e2a98eb849faca6e0666ca947b4c4b82546846ff9f732957f311d4f57be52bbce6a65dbc02a48090605bf9e1b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}