{
  "manageEntity": {
    "action": "Save",
    "entityId": "480871965",
    "entityType": "Track",
    "nonce": "0xb9e214b54620f9854762c035d8e2566fbd6477475597e1eb3927b480f558c88e",
    "signature": "0x66df4965f022dea56ebae8d28af011c7d9ebb5ec057c91b75dd06ecd92e8098d4bb57a8ab5dde6e3b7164bb3e7de20f9a2d8cf015fe01070eb11649664c6b4331c",
    "signer": "0xBD46d315142217685c7fE4aC6359DFfe663E7a4D",
    "userId": "409129"
  }
}