{
  "manageEntity": {
    "action": "Save",
    "entityId": "1609760317",
    "entityType": "Track",
    "nonce": "0xf852f42b4f3677dadc5fa2add81f4e796cc73df4b567ad4ae3244802da572795",
    "signature": "0xc34b89d5492009ad1448aef3d4785fe26f990299213728ce54268d47633dd6561eb07401ad14f10f05632c091bd7f3bad776f6b2df6abf1c9e809626bf9be5941b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}