{
  "manageEntity": {
    "action": "Save",
    "entityId": "240316",
    "entityType": "Track",
    "nonce": "0x1babcb3321a8d2ab74e558d316bc3070016411afb86ea6509fe39c37a6eb2489",
    "signature": "0xf68e1f111b7fd4574e0ca4f5745ea7684b7da3b1f886d6b0274ce75b37ec5b203130af0196671c6fe89150dc7424840ee0d3cc00d7c01d2949ed5901bb9337d71b",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}