{
  "manageEntity": {
    "action": "Save",
    "entityId": "559460436",
    "entityType": "Track",
    "nonce": "0xeb2efc1860bb76211f11f20dcea20711b77e4cc35e34f0901ac3f28ecf2295f8",
    "signature": "0xd2229ceb0cc55824402f5bd869b5e1e4a3e9a6bf9d1ed814b5d0d3109c63c0e365f7d01314fc5aa153c070e9d3aa62646bfc9238f809224123f514036691e0881c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}