{
  "manageEntity": {
    "action": "Save",
    "entityId": "279686605",
    "entityType": "Track",
    "nonce": "0x5db6c2b036a9da3d883843ff83612bfec89f38fd89717fa556066f4872ba8d3e",
    "signature": "0xd2e00431ee4f046b3790f54060513fe0a69f81ccf22d70797a9b1d03041516263a8a5599cc2c5a89b9ff2833e5612007870cafe3acd28d8460456c08b33b3d4c1c",
    "signer": "0xBEa1dfDBA81a63AaE979F322c34709514594D0D0",
    "userId": "705121733"
  }
}