{
  "manageEntity": {
    "action": "Save",
    "entityId": "831736614",
    "entityType": "Track",
    "nonce": "0x35b73da55527f5b8c4499f3ba59580f4bcf5b985f6dac309e5001479fd20a517",
    "signature": "0xd5397e68c65e1be7f84771e2512cba9a9b91ce2671c3d076cb2d78c4c8ad4b0c73fcb8ab6b0c91175e362f746f4bf3e1c6dd8d8ba4495ac0685975380eeba3a41b",
    "signer": "0xE0EaB915C3153F4a2DF5C6e7b8D58dAc829Fbf2f",
    "userId": "774741623"
  }
}