{
  "manageEntity": {
    "action": "Save",
    "entityId": "684240754",
    "entityType": "Track",
    "nonce": "0x4ad6f09329c9571d963cdef700eea243c7389ae139b093ba07f47bacf564cd12",
    "signature": "0xf87fc5dcda14ecef6b7725668a820f7e346cd8995341f814dd2f81d625158ca155613335e0084e7c0c3bf4d4b649c66d673e1d3b2186b4b5eed3ce6dbb58b23b1c",
    "signer": "0xdB791822A11f5aDc830669bdADa8121a4558D7A3",
    "userId": "347139808"
  }
}