{
  "manageEntity": {
    "action": "Save",
    "entityId": "1257210880",
    "entityType": "Track",
    "nonce": "0x28f961158e0cb2d8fed7b0e7b72c20c22cb184e7fb084dc2911713bd773aad25",
    "signature": "0xa762f6281cd7f4b9a792ba9849b8586b4816705b38389bb963322ce0f744bad2480b4e8dae04bd09895b0e96289fd7598a2d8cf2f7e1be4d4a89e8720b18ee341c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}