{
  "manageEntity": {
    "action": "Save",
    "entityId": "2107156518",
    "entityType": "Track",
    "nonce": "0x227e422644d75751e2833802a8edec70f03eff4ecefe2c490d4fe68d94c5c6a6",
    "signature": "0x7b7e5326e98ea0bd2389cbcd77e72de03dc33c64cf5af862478f868065eb74983e9e665c8b57743d6a065b6aac4f08db17f042ef5de544ed44205700d2e2ac181b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}