{
  "manageEntity": {
    "action": "Save",
    "entityId": "1512352672",
    "entityType": "Track",
    "nonce": "0x0a5adeca8e2d02802074b32cb58648c1398b1f9f8a713027fefe3f6d7330e6ba",
    "signature": "0x0282c76eec98688e754be37f00f214b17f8c616d434f83b56dc4fc4f965e5e6c339aac8c39c72515f35df41a42639588e9f5d7190daa2ad1f4d0de06380b40601b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}