{
  "manageEntity": {
    "action": "Save",
    "entityId": "974339203",
    "entityType": "Track",
    "nonce": "0xfc62eeab34a5878bc063a4cb64426a9ff7df5be8b66d9081b1a7e1c09500c3bc",
    "signature": "0x3847f3a183d924aeacbde28cdccdf4255b02ec4d5d97027aaf5bfebb372700be2f5705f2940d7626499a1bd9122faba561d3f0661db17eccd31b50d4e12fe9f61b",
    "signer": "0x849938DF063059EbF6d907f55E72C083347C9343",
    "userId": "796529120"
  }
}