{
  "manageEntity": {
    "action": "Save",
    "entityId": "1068740",
    "entityType": "Track",
    "nonce": "0xac9d745bd2b17e48b34328363633c55dbb48dc4b59df30a2d258265452477dbc",
    "signature": "0x3d09da40f258a127d729cf574fe57353bc0ae347ab198f45e2b680e51a1b1cf668326339eae2582a096e440537c365ac8a459ba26ede166b9044a1076aab96161c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}