{
  "manageEntity": {
    "action": "Save",
    "entityId": "1250338066",
    "entityType": "Track",
    "nonce": "0xb6cda6c9eb9d1e912b561a1f600f798d83403fe878538527071e15dc4b815f9f",
    "signature": "0x5047280d04b46fe99752ac713aeaba64d255ffaf303ee5df15310f1b84acc8a1302cfc8709ded224e1c8ad18e6b5d588af9a593cd7d6d4857f01e80d1882e0b11c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}