{
  "manageEntity": {
    "action": "Save",
    "entityId": "112142605",
    "entityType": "Track",
    "nonce": "0x10aae6e805fa4abb70a19e91e00949a53655a74dca3572ffca7a2468b7af22d3",
    "signature": "0x18f91ae61d05793da90a29bcb3928378e451c1d95819e6744c7576c81140a671171d56ad6eaf720ca2a7bda3dc7acf495b81c562a9962464ec22834a80c6e1581b",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}