{
  "manageEntity": {
    "action": "Save",
    "entityId": "383556068",
    "entityType": "Track",
    "nonce": "0x093e862c24dd2e78a04678baab76604ba51c7ec74d603a436c4fd87d3f452171",
    "signature": "0x344c4e69f24eeabcb62199dd731e1e735f48369140de6a7ef6eadea5eeed079730e79bed4e7db5a3603566a0199f6e2cc6c532bdd27b82b8f8e57daa4e3e1b641c",
    "signer": "0x574080134759e7732eeA17C9e327663E02011E21",
    "userId": "175492811"
  }
}