{
  "manageEntity": {
    "action": "Save",
    "entityId": "103192984",
    "entityType": "Track",
    "nonce": "0x9cba88662b5d86ae53387f0767400bcf1c09798a3553a4e8239e64a9f90974ad",
    "signature": "0xdc6d17ec9bd9ce029afdccc2621438a33fda75d2b98126e603dbc68cc0f7571d33427e60dc90bbe98c00216da3a46e6689ce1a6bf1371864f2c553b6191adc0f1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}