{
  "manageEntity": {
    "action": "Save",
    "entityId": "1686108364",
    "entityType": "Track",
    "nonce": "0xd53d6e1930e5b5800343a0b0d15ce578e80fbf23f43983d6a3d959e7f6146771",
    "signature": "0x3f942ffcddd3ef90dd88fc2e1fa6586e3cf992f95bb969967d6f62e4d91a6988349fc64def41b216b2a2898fdb9eee8089660ecd6b139cd9137596d5e29ab7f71b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}