{
  "manageEntity": {
    "action": "Save",
    "entityId": "1416144198",
    "entityType": "Track",
    "nonce": "0x16dcab82fbdd9c678a1805398b81b28496dfe0a5bfa3d02028c9e81bc2784457",
    "signature": "0x8c3b2a5bd3d57b6811eef700e7eeb6a8de6b0394ee90c6bc70379d2bd3179b4e1502bc298efb08ea741486bc35817725c267e45827f11cd4aa772fa1a3e203bf1c",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}