{
  "manageEntity": {
    "action": "Save",
    "entityId": "622314",
    "entityType": "Track",
    "nonce": "0x76899c55a47d3649d1c01e6cb83d3efc818c84772ba102822b43b49dd33d3aad",
    "signature": "0x1e7620b8d04c1c75f1dcbeb4468a4ed7580e1c5c869e4435b030fca38453a08d4964832c8d9e46bd1c746931add296abb047e5e0870a07e84193e4d00d60ca611c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}