{
  "manageEntity": {
    "action": "Save",
    "entityId": "824222276",
    "entityType": "Track",
    "nonce": "0x39d30ed990e92805808e4dc5baaac39c9c0b461b65096a13d94229b8382c37a9",
    "signature": "0x665adb0adfa1e6f1ee0ace617d28daaf1a6a4c4ad686aa92a0b464c2c2d5705a295e559241724cde0a066abce3f0bd9bd3da5daa4fe8aa5c0074d3b06615fa611b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}