{
  "manageEntity": {
    "action": "Save",
    "entityId": "370940875",
    "entityType": "Track",
    "nonce": "0x78b6d67736f4e815572cf36a79c0b4c0f1d5ce9d5c78f299d18c8c5f24ad2816",
    "signature": "0xf4718bf006e21d57fed5c731efd5747cec2083d7e980545cb21c02dddb6e848757752ef45d883ecd81ba21e2e3d8c88cd6be66efc25336c63906d6d276ad98911c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}