{
  "manageEntity": {
    "action": "Save",
    "entityId": "915462503",
    "entityType": "Track",
    "nonce": "0xd3f8d8b9cbef499cc9d8643dd551eaca9dc301469fc901d56c56cc26efddbec2",
    "signature": "0x66ade720fe6a41fe838ea87bdce8b4331fe98bc0f2042737f29805bbf4eb963a79f4d3c771ec525da61845d2b13fa354b7399aa42047c18198e718855a3941b91b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}