{
  "manageEntity": {
    "action": "Save",
    "entityId": "1030588488",
    "entityType": "Track",
    "nonce": "0x6d83e696644d08d06b3d08b482f8695850737a4f58f60989aff229b740486e81",
    "signature": "0x04bd9d6604180213a9deb16e15b76f5f9c08b5cd97371bf8f0c18652deff5d57145a5e479fc64b3f8227d8bc41d9323f034ffc2af6c574b70c8e3ca7073ed64a1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}