{
  "manageEntity": {
    "action": "Save",
    "entityId": "357212830",
    "entityType": "Track",
    "nonce": "0x731561cdf9ddca7af1796d0cdfb58274e0c3d5a8689dcd00bb095a81c19f4dea",
    "signature": "0xc01b762fb0967072a04c819e69bc9c2da39bf578e4294f17749bac951c30569b50dab6528e4bffcbd6e4e28bf703fadd6b2ba079697710cd1eba94ca0aa0b45e1b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}