{
  "manageEntity": {
    "action": "Save",
    "entityId": "416394697",
    "entityType": "Track",
    "nonce": "0xe3821cc26a06d6ed23695dd0e9c19c49fb67c1d1bc28c483bb164047af6bc146",
    "signature": "0x3bbc710389e285f44206188f8522e6e7994f2afa66d139d7d4d83450745df2fd769d78c80f53db484d3c147370d3c71b283f2fc63297d3218be15be6f242548b1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}