{
  "manageEntity": {
    "action": "Save",
    "entityId": "1319559907",
    "entityType": "Track",
    "nonce": "0xc93fe1e5a1ced5ba736e821d60a7a549fd02dd4786ac354b4a2a360b0aeba0e5",
    "signature": "0x54753deafd72f20de412fd979fb68d7e1c0b29ffcd238f69a59a830a4274ee503c1a54bd4957c00781758e15f519fd6360b9da6bb782f306cb2df4930af5f8701b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}