{
  "manageEntity": {
    "action": "Save",
    "entityId": "135764243",
    "entityType": "Track",
    "nonce": "0x80f4520b8cf3da9fb9e5084c87481810668eef4059cf299a7253c5e577e0775d",
    "signature": "0xe5239c66bbf08e0fee3ea1e8366f6bc6399a1505d17c728f13761aeb5650abbc147dad8122c4790097358bc4924e396952981bf348e759e4ac6fdd3c008052311b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}