{
  "manageEntity": {
    "action": "Save",
    "entityId": "630983",
    "entityType": "Track",
    "nonce": "0x1e925e5c8851883e2a7bef33b0ee72d387d07e08f9e5eb9006ea91909952bba0",
    "signature": "0x6866d17bb1123f653c263cafabb9327aa6ce44528be2e3e4e6ba9c51b4eea467235fae5665430a37d2011da699f1aad45f2d631f535547152a8035975fbe590c1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}