{
  "manageEntity": {
    "action": "Save",
    "entityId": "2009974265",
    "entityType": "Track",
    "nonce": "0x47930f4f6c3798e0a24d7fde31696bcfdc3b1e1ccc8d20bd0947c12028cf0fdf",
    "signature": "0xcef66c9caa7cfa35d046e614ea98b4f50571e70db22d67cf668ceb0c810bcd213ea57a4e9da7a5b20367f6e38d41f9b08c6e8af10a69d62f6b7881d9bee58c511b",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}