{
  "manageEntity": {
    "action": "Save",
    "entityId": "261263891",
    "entityType": "Track",
    "nonce": "0xdee8837dfc261c3aba074bbc71c06d864e63189bba20a9af30388b32e0ace6bb",
    "signature": "0xbb01c86ef3f5bcf4acb081a3cbefc70781fc096325e0e7a2723b3252dc4391772017c7bdd95c4edffa7f44157d04d4be7679369ee72a75a0d39524f4e7100e181c",
    "signer": "0x3324C23609BC25902C39CFa38CF40581c7Bc7F87",
    "userId": "229134011"
  }
}