{
  "manageEntity": {
    "action": "Save",
    "entityId": "1901056710",
    "entityType": "Track",
    "nonce": "0x1d26e8a0b7399e5dc524b0337ae285385db8ba779b3c331ebcc77dbc246ee039",
    "signature": "0x66552253b35746ef1d12651ef9d6d8bca57767fdbbb517962c6045a557735f7f61509e93fac7b70a1dec90199dd6124d38fdf001b0170a2f3610c55f48abbf5e1b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}