{
  "manageEntity": {
    "action": "Save",
    "entityId": "1061899347",
    "entityType": "Track",
    "nonce": "0xe94b3c679a7cc9fb2f3ac886a34e9c9de69f49f0067295ae30ae7f7d5cda52e7",
    "signature": "0x864571ec162d9b2becfb30a43773c95474a170307b9a0f9691a916985c4cbf141904f5ca59459afd25069a2fc443f5e02897d6042fc706a4694eb4336bcd607e1c",
    "signer": "0xa7f0fAC35a48AE70Edb0Ce8E7b95f574553b2Ebf",
    "userId": "131088373"
  }
}