{
  "manageEntity": {
    "action": "Save",
    "entityId": "1031239",
    "entityType": "Track",
    "nonce": "0xe88aae568742b4d9c2676d17ddd0e1357cb4ba71351397bd4ae2f7941335215c",
    "signature": "0x2a5e2acc4d2ffa7737a1a39e0027ba4fece731e1de259e76bd70a2d112d2bef527adc2986c951c2d7fe5ac65278898f3676b92adda6dbe2718c22bd1bf6296b31c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}