{
  "manageEntity": {
    "action": "Save",
    "entityId": "1302958443",
    "entityType": "Track",
    "nonce": "0x519a473e908c1ce70771e8dd6532b629377d42bc57eace4e45a72fe68c65ce7a",
    "signature": "0x84541216469be175eb030d5bed6e3aaa885e102b39ec90603db0e79273f3a8e86dfacd67b8d5d7665ad309f7acbd0b8dab2faf425e22cc93a2310bc1c782749b1c",
    "signer": "0x262FfE6368E86674bFd32404757f3A8B1a189F85",
    "userId": "664900058"
  }
}