{
  "manageEntity": {
    "action": "Save",
    "entityId": "498092501",
    "entityType": "Track",
    "nonce": "0x00638e432f15e892b4cb36857e6a4e6dc2bc79b92b377dd32808ef3d3b615bdd",
    "signature": "0xe2e9c4818d6859cc0378fe6c43fd51e8b89e847da21add8f9485e85d531e2f333e899135888f74b9f53bde7f8f427499bb3a00af2cd6c937c574632fa779d5f81c",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}