{
  "manageEntity": {
    "action": "Save",
    "entityId": "365597795",
    "entityType": "Track",
    "nonce": "0x570b95e49542247f999685f67ce781ee2854ce6ff620f8f3422461bf827ff309",
    "signature": "0x1a6c82b64cbd392827b6577c93b646dc6f6a0feacb3e9a110788d78dd873b7ef4a2ba8a3c508376180a02d432dd72a6d03e122d0705f2ab38439839dad9cc6751b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}